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https://github.com/omonimus1/competitive-programming

🔥 🖥️ Competitive programming guide, learning materials and my own coding solutions from Codechef, Leetcode,Geeks for Geeks, HackerRank, Spoj, Codebyte, InterviewBit, CodingBlock & other platforms
https://github.com/omonimus1/competitive-programming

algorithm algorithms-and-data-structures codechef-solutions competitive-programming-contests competitive-programming-notes competitve-programming cpp data-structures geeksforgeeks-solutions hackerrank-solutions interview-practice interview-preparation leet leetcode-cpp leetcode-solutions python tutorial

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🔥 🖥️ Competitive programming guide, learning materials and my own coding solutions from Codechef, Leetcode,Geeks for Geeks, HackerRank, Spoj, Codebyte, InterviewBit, CodingBlock & other platforms

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README 

        
# Competitive-programming



The current repository contains a set of learning resources, and coding challenges solutions that I have implemented as result of my training, to ace a Big Tech interview that allowed me to receive an offer at Microsoft for a SWE intern role. 

NOT everything you may read in this repository is the overall knowledge requierd during an algorithms and data-structures round, but I have started from zero, just like you, and from zero to half-hero, almost everything produced or needed has been shared in this repository. 



## Technologies used

![C++](https://img.shields.io/badge/c++-%2300599C.svg?style=for-the-badge&logo=c%2B%2B&logoColor=white)

![Python](https://img.shields.io/badge/python-3670A0?style=for-the-badge&logo=python&logoColor=ffdd54)

![Java](https://img.shields.io/badge/java-%23ED8B00.svg?style=for-the-badge&logo=java&logoColor=white)



## Get mentored by me

 MentorCruise 



# Index of content

1. [Structure of the repository](#Structure-of-the-Repository)

2. [Platforms for Training](#Best-Platforms-for-training)

3. [When contribute](#When-contribute)

4. [How to contribute](#How-to-contribute)

6. [Connect with me](#Connect-with-me)



## Structure of the Repository



|Folder|Content|

|-------|:------:|

|Lectures (Algorithm and data-structures)|[Notes about Algorithm And Data Structures](Lectures/README.md)|

|Must know algorithms checklist|[Go to resources](MUST_KNOW_ALGORITHMS.md)|

|System Design preparation|[System design interview preparation](system-design/README.md)|

|Readings material|[Free e-books about Competitive Programming](Reading/)|

|Geeks For Geeks solutions|[Geeks For GfG coding solutions](geeksforgeeks/README.md)|

|HackerRank solutions |[My own HackerRank coding solutions](HackerRank/README.md)|

|Codingblock solutions|[My own Codingblock coding solutions](codingblock/README.md)|

|CodeSignal solutions|[My own CodeSignal Solutions](codesignal/README.md)|

|CodeChef solutions| [My own Codechef coding solutions](codechef/)|

|UVA|[My own UVA Online Judge solutions ](UVA/)|

|InterviewBit|[My Interview Bit solutions ](interviewbit/README.md)|

|Leetcode solutions|[My Leetcode solutions ](interviewbit/README.md)|

|learn_data_structures|[ Warm App coding examples to learn Data Structures](learn_data_structures/)|



## PLEASE

If you need more material like this, [nominate me as github start, to get help the project to gain more visibility and contributions](https://stars.github.com/program/)

## Best Platforms for training



 [![Hackerrank](https://img.shields.io/badge/-hackerrank-7cfc00?style=flat&labelColor=7cfc00&logo=hackerrank&logoColor=white)](https://www.hackerrank.com/davidepollicino1)	

[![InterViewBit](https://img.shields.io/badge/-Interviewbit-87ceeb?style=flat&labelColor=87ceeb&logo=Interviewbit&logoColor=white)](https://www.interviewbit.com/profile/omonimus1)

[![GeeksForGeeks](https://img.shields.io/badge/geeksforfeeks-davidepollicino-green)](https://auth.geeksforgeeks.org/user/davidepollicino/practice/)	

[![LeetCode](https://img.shields.io/badge/-LeetCode-ff8c00?style=flat&labelColor=ff8c00&logo=LeetCode&logoColor=white)](https://leetcode.com/omonimus1/)

[![Codingblocs](https://img.shields.io/badge/-codingblocks-blue)](https://hack.codingblocks.com/app/users/242275)

[![Codesignal](https://img.shields.io/badge/codesignal-blue.svg)](https://app.codesignal.com/profile/davide_p7)	

[![Codechef](https://img.shields.io/badge/-Codechef-909090?style=flat&labelColor=909090&logo=Codechef&logoColor=white)](https://www.codechef.com/users/omonimus)

[![CodeForces](https://img.shields.io/badge/-CodeForces-ec6161?style=flat&labelColor=ec6161&logo=CodeForces&logoColor=white)](https://codeforces.com/profile/Davide_Pollicino)	

[![Hackerearth](https://img.shields.io/badge/hackerearth-purple.svg)](https://www.hackerearth.com/@davide12)	



## How to contribute

1. Fork the repository

2. Do the desired changes (add/delete/modify)

3. Make a pull request



## When contribute

1. If there is no solution to a problem in the main branch.

2. If your solution is asymptotically faster than the one in the main branch.

3. If your algorithm is of the same time complexity but with reduced code size. In this case, comment out the original solution and make a pull request with your solution.

4. If you have another method of solving the problem which is asymptotically slower than the original method then, comment your solution in the main file and make a pull request.

5. If you would like to make any positive change to the lectures content



## I appreciate any feedback

Constructive criticisms or code reviews of any kind are very much welcome.



If you have any questions about the solutions you can find here, feel free to contact me at: [[email protected]](mailto:[email protected]?subject=[GitHub]%20CompetitiveProgramming)



- 📫 How to reach me: **You can find me also on [Linkedln](https://www.linkedin.com/in/davidepollicino7/)** or 💌Mail me at [[email protected]]()



# Social Media #

[![Github](https://img.shields.io/badge/-Github-000?style=flat&logo=Github&logoColor=white)](https://github.com/omonimus1)

[![Linkedin](https://img.shields.io/badge/-LinkedIn-blue?style=flat&logo=Linkedin&logoColor=white)](https://www.linkedin.com/in/davidepollicino7/)



## Support me

[Paypal Me](https://www.paypal.com/paypalme/davidepollicino7?locale.x=en_US)



Buy Me A Coffee



## Incoming Materials

1. Prefix Sum

2. Sliding Window Technique

3. Binary search

4. GCD of two numbers in LogN

5. Sieve of Eratosthenes, Segmented Sieve

6. Modular arithmetic

7. Bit Manipulation

8. Greedy Algorithms

9. Two Pointers

10. Kadane's Algorithm

11. Meet in the Middle Algorithm

12. Recursion

13. Divide and Conquer

14. Next Greater/Smaller Element using Stack

15. Problems related to Parenthesis

16. Backtracking

17. Problems related to Constructive Algorithms

18. Problems related to Heap

19. Inclusion-Exclusion Principle

20. Finding nCr and nPr for Queries

21. Rabin Karp Algorithm

22. Prefix Function

23. KMP Algorithm

24. Z-Function

25. Manacher's Algorithm

26. DFS/BFS Traversal in Graph/Tree

27. Diameter of Tree

28. Euler Tour of Tree

29. Finding LCA using Euler Tour

30. Finding LCA using Binary Lifting

31. Distance between two nodes

32. Subtree Problems

33. Connected Components, Topological Sort, Cycle Detection, Bipartite Check-in Graph

34. Dijkstra's Algorithm

35. Bellman-Ford Algorithm

36. Floyd Warshall Algorithm

37. Bridges in Graph

38. Prim's Algorithm

39. 0/1 BFS

40. Dynamic Programming, DP with Bitmask, DP on trees

41. Disjoint Set

42. Kruskal's Algorithm

43. Fenwick Trees, Binary Lifting on Fenwick Tree

44. Matrix Exponentiation

45. Sqrt Exponentiation

46. Segment Trees

47. Lazy Propagation on Segment Trees

48. Sprague/Grundy Theorem

49. Heavy Light Decomposition

50. FFT/NTT



If you need more material like this, [nominate me as github start, to get help the project to gain more visibility and contributions](https://stars.github.com/program/)